Impeller of an electric fan



FIG. 1 is a front perspective view of an impeller of electric fan of the present invention;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof; and,

FIG. 5 is a left side view thereof, the right side view, the top view and the bottom view each being a mirror image of the left side view. 

We claim the ornamental design for an impeller of electric fan, as shown and described. 